Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ead6fcc570b0de17003cc87b260dd5cedc1710f346767986fb5f1ec251d14c63' 
  AND token = 'Q9zL3PWSKySgyY2/sEn4k8vuZFl3uX6aa9E+u/ukQsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}